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"polyglot" is also used as a crossword clue. If that's what you saw, the answer is often multilingual (12 letters).
Definitions
having a command of or composed in many languages
Used in a sentence
“But ſince that period the biblical apparatus has been much enriched by the publication of polyglots; […]”
“Laſtly, a polyg[l]ot or good linguiſt may alſo be term'd a uſefull learned man, ſpecially if vers'd in School-languages.”
“'[T]is thought the two and twenty Languages which Mythrydates the great Polyglot King of Pontus did ſpeak, wer all within the circumference of Anatolia in regard his dominions extended but a little further: […]”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Many-language speaker”8 letters
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